Black would look pretty sweet with the gold guard. I refinished mine in black, but haven't gotten a replacement guard yet. The original gold guard was pretty trashed, and for right now I have a cheap plastic black one on it that looks cheesy, but the paint job turned out great.

I found a '69 that had been spray-painted (!!) black & dinged to hell & back-
My choice was to have the paint removed down to the natural alder & very lightly tung-oiled-
Absolutely beautiful! This worked in large part to the nice grain that my "slab" had- each one is different, so if your original body has a nice character in its grain- believe me it will look fantastic! I had the neck sanded/oiled as well
(best damn neck Leo made!!) re-fretted, new pick-guard, new Duncan P-Bass pups, new hardware, Bad-Ass- That bass cooks-yours will too-you got it going on with the pickguard, etc. If your grain is nice-go natural- otherwise, I would opt for a Fender "DuPont" look of your choice, or a butterscotch tint to keep the old-school vibe.
Muy congrats on a wonderful axe----